import { BigNumber } from 'ethers'

import {
  ETH_USDC,
  ETH_USDT,
  NATIVE_ADDRESS,
} from '../../../constants/testValues'
import { StepParams, decodeStepParams, encodeStepParams } from '../steps'

describe('Steps', () => {
  const ether = BigNumber.from(10).pow(18)

  const param0: StepParams = {
    token: NATIVE_ADDRESS,
    amount: ether.mul(1),
    msgValue: ether.mul(2),
    zapData: '0x',
  }

  const param1: StepParams = {
    token: ETH_USDC,
    amount: ether.mul(3),
    msgValue: ether.mul(4),
    zapData: '0xdeadbeef',
  }

  const param2: StepParams = {
    token: ETH_USDT,
    amount: ether.mul(5),
    msgValue: ether.mul(6),
    zapData: '0x00112233445566778899aabbccddeeff',
  }

  it('roundtrip empty', () => {
    const data = encodeStepParams([])
    expect(decodeStepParams(data)).toEqual([])
  })

  it('roundtrip with one step', () => {
    const data = encodeStepParams([param0])
    expect(decodeStepParams(data)).toEqual([param0])
  })

  it('roundtrip with two steps', () => {
    const data = encodeStepParams([param0, param1])
    expect(decodeStepParams(data)).toEqual([param0, param1])
  })

  it('roundtrip with three steps', () => {
    const data = encodeStepParams([param0, param1, param2])
    expect(decodeStepParams(data)).toEqual([param0, param1, param2])
  })
})